Neans and Parkview area owner :)
I think the Quail Creek area will appreciate for the reasons you noted as well as for the new developments in closer proximity (Domain, Mueller, etc). There are pockets of the area that are nicer than others and some great deals to be had on nice homes.
Another alternative in your price range that's just as close in, if not a little closer, is area 10N. It's between Ben White and William Cannon in South Austin. That area has seen very good appreciation in recent years and should continue that trend.
Danny Gallant - Realtor
The Gallant Group @ Keller Williams Realty